Follow-up time points | |||||
---|---|---|---|---|---|
Outcome measure | Description of prognostic variable | Prognostic variable | 2 weeks | 3 months | 12 months |
Diff. of. adj. R2 | Diff. of. adj. R2 | Diff. of. adj. R2 | |||
Pain intensity (Numeric Rating Scale, 0–10) | LCA-derived subgroupings | Single-stage subgroups | 0.053** | 0. 045** | 0.055** |
Two-stage subgroups | 0.047** | 0.052** | 0.047** | ||
Existing subgrouping tools | STarT Back Tool | 0.022** | 0.006 | 0.008 | |
Quebec Task Force classification | 0.016* | 0.013* | 0.007 | ||
Baseline characteristics | Baseline leg pain intensity (0–10 Numeric Rating Scale) | 0.047** | 0.014* | 0.040** | |
Baseline disability (RMDQ-23) (0–100 = highest disability) | 0.003 | −0.000 | −0.001 | ||
Recovery belief (0–10 = very likely) | 0.060** | 0.105** | 0.056** | ||
Results of first stage of two-stage LCA | All domain-specific patient categorisations | 0.086** | 0.127** | 0.135** | |
Disability (23-item Roland Morris Disability Questionnaire, proportional score) | LCA-derived subgroupings | Single-stage subgroups | 0.069** | 0.078** | 0.059** |
Two-stage subgroups | 0.061** | 0.074** | 0.050** | ||
Existing subgrouping tools | STarT Back Tool | 0.031** | 0.040** | 0.017* | |
Quebec Task Force classification | 0.024** | 0.042** | 0.037** | ||
Baseline characteristics | Baseline back pain intensity (0–10 Numeric Rating Scale) | −0.011 | −0.004 | −0.009 | |
Baseline leg pain intensity (0–10 Numeric Rating Scale) | 0.024** | 0.034** | 0.041** | ||
Recovery belief (0–10 = very likely) | 0.036** | 0.115** | 0.114** | ||
Results of first stage of two-stage LCA | All domain-specific patient categorisations | 0.086** | 0.155** | 0.154** |